As part of the NHAAP database effort, ORNL integrates data from multiple data sources and provides the most current, detailed, and spatially comprehensive information for analyzing and visualizing existing US hydropower assets. Existing hydropower asset data are housed within the comprehensive NHAAP geographic information system (GIS) at ORNL and used to support various initiatives of the US Department of Energy (DOE) Water Power Program. Existing hydropower asset data allow the nation to monitor its largest source of renewable electricity, integrate it with other resource assessments, and perform a wide variety of analyses used to inform decision makers.
NHAAP data are used to produce and annually update the National Hydropower Map (shown below), which is a visualization accounting for the distribution of existing hydropower plants in the United States by facility type, nameplate capacity, and owner. Please read and agree to the following terms and conditions if you would like to request an account for the HydroGIS web map service to explore or obtain more information on existing hydropower assets and other data made publicly viewable by the ORNL NHAAP team.
Download a printable map
NOTE: Data can be downloaded from HydroGIS in tabular form only. Geographic data are not available for public download through HydroGIS due to existing privacy agreements with our collaborators and data source providers. NHAAP does, however, provide geographic data to the public on a provisional basis resulting from select NHAAP resource assessments and data integration efforts: